Continuous casting and sonar: what they have in common

1. Step 1. Continuous casting — is a kind of — Casting. Casting.
2. Step 2. Casting — is used in — Cannon. Barrels were cast.
3. Step 3. Cannon — includes — Anti-aircraft gun. A gun.
4. Step 4. Anti-aircraft gun — uses — Radar. Radar guidance.
5. Step 5. Radar — works like — Sonar. The same echolocation principle: sound in water instead of radio waves.

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